Using a Facebook Page Tab can be a great way to promote your site by showing content from your site within your Facebook Page. It's a powerful, yet simple, way to show a newsletter subscription form, product page or view of your blog on your Page. Well, it should be simple. Sometimes, it just doesn't work and, when it doesn't, it can be very hard to diagnose. We've worked with thousands of users to integrate Facebook with their website and want to let give out some easy pointers on where to look first.